Comments on: encrypted network filesystems http://www.outflux.net/blog/archives/2006/07/29/encrypted-network-filesystems/ code is freedom -- patching my itch Tue, 06 Jan 2009 20:36:48 +0000 http://wordpress.org/?v=2.5.1 By: kees http://www.outflux.net/blog/archives/2006/07/29/encrypted-network-filesystems/#comment-530 kees Mon, 25 Dec 2006 17:57:46 +0000 http://outflux.net/blog/archives/2006/07/29/encrypted-network-filesystems/#comment-530 Note to self: It's much faster (especially on a NAS) to allocate the loopback volume using "truncate" instead of a full "dd". A sparse file can be created and the loop device will still do the right thing. This command will make a 10G file named "volume": perl -e 'open(FILE,">$ARGV[0]"); seek(FILE,$ARGV[1],0); truncate(FILE,$ARGV[1]);' \ volume $(( 10 * 1024 * 1024 * 1024 )) Note to self:

It’s much faster (especially on a NAS) to allocate the loopback volume using “truncate” instead of a full “dd”. A sparse file can be created and the loop device will still do the right thing. This command will make a 10G file named “volume”:

perl -e ‘open(FILE,”>$ARGV[0]“); seek(FILE,$ARGV[1],0); truncate(FILE,$ARGV[1]);’ \
volume $(( 10 * 1024 * 1024 * 1024 ))

]]>